From bdc3445a679cf630cb62482621aa1a91acbe092d Mon Sep 17 00:00:00 2001
From: Samuel Andert <samuel@ora.earth>
Date: Fri, 28 Jul 2023 22:25:31 +0200
Subject: [PATCH] Added xState as flow engine

---
 package.json                                  |   4 +-
 pnpm-lock.yaml                                |  26 ++
 src/lib/components/examples/Recipies.svelte   | 281 ++++++++++++------
 src/lib/components/examples/TreeForm.svelte   |  68 -----
 .../{recipies => examples}/userService.ts     |   0
 src/lib/components/recipies/recipeStore.ts    |   8 -
 src/lib/types/TreeSchema.ts                   |  13 +-
 svelte.config.js                              |   4 +
 8 files changed, 228 insertions(+), 176 deletions(-)
 delete mode 100644 src/lib/components/examples/TreeForm.svelte
 rename src/lib/components/{recipies => examples}/userService.ts (100%)
 delete mode 100644 src/lib/components/recipies/recipeStore.ts

diff --git a/package.json b/package.json
index d464f18..8d93b69 100644
--- a/package.json
+++ b/package.json
@@ -52,6 +52,8 @@
 		"@lit-protocol/types": "^2.2.41",
 		"@sveltejs/vite-plugin-svelte": "^2.4.2",
 		"@wagmi/core": "^1.3.8",
-		"viem": "^1.3.0"
+		"@xstate/svelte": "^2.1.0",
+		"viem": "^1.3.0",
+		"xstate": "^4.38.2"
 	}
 }
\ No newline at end of file
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ce0171e..5179453 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -31,9 +31,15 @@ dependencies:
   '@wagmi/core':
     specifier: ^1.3.8
     version: 1.3.8(react@18.2.0)(typescript@5.1.6)(viem@1.4.1)(zod@3.21.4)
+  '@xstate/svelte':
+    specifier: ^2.1.0
+    version: 2.1.0(svelte@4.1.1)(xstate@4.38.2)
   viem:
     specifier: ^1.3.0
     version: 1.4.1(typescript@5.1.6)(zod@3.21.4)
+  xstate:
+    specifier: ^4.38.2
+    version: 4.38.2
 
 devDependencies:
   '@iconify/svelte':
@@ -3260,6 +3266,22 @@ packages:
       - react
     dev: false
 
+  /@xstate/svelte@2.1.0(svelte@4.1.1)(xstate@4.38.2):
+    resolution: {integrity: sha512-cot553w2v4MdmDLkRBLhEjGO5LlnlPcpZ9RT7jFqpn+h0rpmjtkva6zjIZddPrxEOM6DVHDwzYbpDe+BErElQg==}
+    peerDependencies:
+      '@xstate/fsm': ^2.1.0
+      svelte: ^3.24.1 || ^4
+      xstate: ^4.38.1
+    peerDependenciesMeta:
+      '@xstate/fsm':
+        optional: true
+      xstate:
+        optional: true
+    dependencies:
+      svelte: 4.1.1
+      xstate: 4.38.2
+    dev: false
+
   /JSONStream@1.3.5:
     resolution: {integrity: sha512-E+iruNOY8VV9s4JEbe1aNEm6MiszPRr/UfcHMz0TQh1BXSxHK+ASV1R6W4HpjBhSeS+54PIsAMCBmwD06LLsqQ==}
     hasBin: true
@@ -7148,6 +7170,10 @@ packages:
       utf-8-validate: 5.0.10
     dev: false
 
+  /xstate@4.38.2:
+    resolution: {integrity: sha512-Fba/DwEPDLneHT3tbJ9F3zafbQXszOlyCJyQqqdzmtlY/cwE2th462KK48yaANf98jHlP6lJvxfNtN0LFKXPQg==}
+    dev: false
+
   /xstream@11.14.0:
     resolution: {integrity: sha512-1bLb+kKKtKPbgTK6i/BaoAn03g47PpFstlbe1BA+y3pNS/LfvcaghS5BFf9+EE1J+KwSQsEpfJvFN5GqFtiNmw==}
     dependencies:
diff --git a/src/lib/components/examples/Recipies.svelte b/src/lib/components/examples/Recipies.svelte
index 9efb393..ae73e44 100644
--- a/src/lib/components/examples/Recipies.svelte
+++ b/src/lib/components/examples/Recipies.svelte
@@ -1,105 +1,200 @@
-<script lang="ts">
-	import { Stepper, Step } from '@skeletonlabs/skeleton';
-	import { recipeStore } from '$lib/components/recipies/recipeStore';
-	import { createMessage } from '$lib/services/messages/messages';
+<script>
+	import { createMachine, assign } from 'xstate';
+	import { useMachine } from '@xstate/svelte';
+	import { superForm } from 'sveltekit-superforms/client';
+	import { TreeSchema } from '$lib/types/TreeSchema';
+	import { writable, get } from 'svelte/store';
+	import { createUser } from './userService';
 
-	let name = '';
-	let email = '';
-	let lockedState = true;
+	const initialFormData = { name: '', age: '' };
 
-	function logOperation(text) {
-		const message = {
-			text: text,
-			sender: 'user',
-			type: 'chat'
-		};
-		createMessage(message);
-	}
+	const { form, errors, validate, constraints, capture, restore } = superForm(initialFormData, {
+		validators: TreeSchema,
+		warnings: {
+			noValidationAndConstraints: false
+		},
+		validationMethod: 'oninput',
+		clearOnSubmit: 'errors-and-message'
+	});
 
-	function operation1() {
-		if (name) {
-			recipeStore.update((state) => {
-				state.context.name = name;
-				state.step = 1;
-				return state;
-			});
-			logOperation('Name added: ' + name);
-		} else {
-			alert('Error: Please enter a name');
+	export const snapshot = { capture, restore };
+
+	const isFormValid = writable(false); // Store to keep track of form validation status
+
+	async function handleSubmit() {
+		const validationResult = await validate();
+		if (!validationResult.valid) {
+			return;
 		}
+		console.log(form);
+		isFormValid.set(true); // Set the form validation status to true after successful validation
 	}
 
-	function operation2() {
-		if (email) {
-			recipeStore.update((state) => {
-				state.context.email = email;
-				state.step = 2;
-				return state;
-			});
-			logOperation('Email added: ' + email);
-		} else {
-			alert('Error: Please enter an email');
+	const stateMachine = createMachine(
+		{
+			id: 'steps',
+			initial: 'start',
+			context: {
+				name: '',
+				email: ''
+			},
+			states: {
+				start: {
+					on: { NEXT: 'nameInput' }
+				},
+				nameInput: {
+					on: {
+						NEXT: {
+							target: 'emailInput',
+							actions: ['setName']
+						},
+						BACK: 'start'
+					}
+				},
+				emailInput: {
+					on: {
+						NEXT: {
+							target: 'summary',
+							actions: ['setEmail']
+						},
+						BACK: 'nameInput'
+					}
+				},
+				summary: {
+					on: {
+						SUBMIT: 'submitting'
+					}
+				},
+				submitting: {
+					invoke: {
+						src: 'createUserService',
+						onDone: 'success',
+						onError: 'failure'
+					}
+				},
+				success: {},
+				failure: {}
+			}
+		},
+		{
+			actions: {
+				setName: assign({
+					name: (context, event) => $form.name
+				}),
+				setEmail: assign({
+					email: (context, event) => $form.email
+				})
+			},
+			services: {
+				createUserService: (context) => createUser(context.name, context.email)
+			}
 		}
-	}
+	);
 
-	function completeAndPrepareForRestart() {
-		logOperation('Recipe Completed. Preparing for restart...');
-		recipeStore.update((state) => {
-			state.step = 3;
-			return state;
-		});
-	}
+	const { state, send } = useMachine(stateMachine);
 
-	function restartRecipe() {
-		name = '';
-		email = '';
-		recipeStore.set({
-			id: 'createUser',
-			step: 0,
-			context: {},
-			error: null
-		});
-	}
-
-	$: lockedState = ($recipeStore.step === 0 && !name) || ($recipeStore.step === 1 && !email);
-
-	function onStepHandler(e) {
-		if (e.detail.state.current === 1) {
-			operation1();
-		} else if (e.detail.state.current === 2) {
-			operation2();
-		} else if (e.detail.state.current === 3) {
-			completeAndPrepareForRestart();
-		}
+	$: {
+		// Reactively update the form validation status based on the errors
+		isFormValid.set(Object.keys(get(errors)).length === 0);
 	}
 </script>
 
-<div class="flex items-center justify-center w-full h-full">
-	<Stepper on:step={onStepHandler} start={$recipeStore.step} class="w-full max-w-2xl">
-		<Step locked={lockedState}>
-			<svelte:fragment slot="header">Enter Name</svelte:fragment>
-			<div>
-				<label for="name">Name:</label>
-				<input type="text" class="text-black" bind:value={name} />
-			</div>
-		</Step>
-		<Step locked={lockedState}>
-			<svelte:fragment slot="header">Enter Email</svelte:fragment>
-			<div>
-				<label for="email">Email:</label>
-				<input type="text" class="text-black" bind:value={email} />
-			</div>
-		</Step>
-		<Step>
-			<svelte:fragment slot="header">Completed</svelte:fragment>
-			<h2>Recipe Completed</h2>
-			<p>Your Name: {$recipeStore.context.name}</p>
-			<p>Your Email: {$recipeStore.context.email}</p>
-		</Step>
-		<Step>
-			<svelte:fragment slot="header">Restart</svelte:fragment>
-			<h2>Ready to start over?</h2>
-			<button on:click={restartRecipe}>Restart</button>
-		</Step>
-	</Stepper>
-</div>
+<main>
+	{#if $state.value === 'start'}
+		<!-- Step 1 -->
+		<div>
+			<h1 class="text-2xl">Step 1 - Start</h1>
+			<button class="px-4 py-2 mt-4 text-white bg-blue-500 rounded" on:click={() => send('NEXT')}>
+				Next
+			</button>
+		</div>
+	{:else if $state.value === 'nameInput'}
+		<!-- Step 2 -->
+		<div>
+			<h1 class="text-2xl">Step 2 - Name Input</h1>
+			<form on:submit|preventDefault={handleSubmit} class="w-full max-w-md">
+				<div class="mb-4">
+					{#if $errors.name}
+						<span class="block mb-2 font-semibold text-red-500">{$errors.name}</span>
+					{:else}
+						<label for="name" class="block mb-2 font-semibold text-white">Name</label>
+					{/if}
+
+					<input
+						name="name"
+						type="text"
+						class="w-full px-3 py-2 bg-transparent border-gray-100 rounded-md border-1 ring-0 ring-white focus:outline-none focus:ring-2 focus:ring-blue-500"
+						bind:value={$form.name}
+						aria-invalid={$errors.name ? 'true' : undefined}
+						{...constraints.name}
+					/>
+				</div>
+				<button
+					type="submit"
+					class="w-full px-4 py-2 mt-4 text-white bg-blue-500 rounded-md hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-blue-500"
+					disabled={$errors.name}
+					on:click={() => send('NEXT')}
+				>
+					Next
+				</button>
+			</form>
+		</div>
+	{:else if $state.value === 'emailInput'}
+		<div>
+			<h1 class="text-2xl">Step 3 - Email Input</h1>
+			<form on:submit|preventDefault={handleSubmit} class="w-full max-w-md">
+				<div class="mb-4">
+					{#if $errors.email}
+						<span class="block mb-2 font-semibold text-red-500">{$errors.email}</span>
+					{:else}
+						<label for="email" class="block mb-2 font-semibold text-white">Email</label>
+					{/if}
+
+					<input
+						name="email"
+						type="email"
+						class="w-full px-3 py-2 bg-transparent border-gray-100 rounded-md border-1 ring-0 ring-white focus:outline-none focus:ring-2 focus:ring-blue-500"
+						bind:value={$form.email}
+						aria-invalid={$errors.email ? 'true' : undefined}
+						{...constraints.email}
+					/>
+				</div>
+				<button
+					type="submit"
+					class="w-full px-4 py-2 mt-4 text-white bg-blue-500 rounded-md hover:bg-blue-600 focus:outline-none focus:ring-2 focus:ring-blue-500"
+					disabled={$errors.email}
+					on:click={() => send('NEXT')}
+				>
+					Next
+				</button>
+			</form>
+		</div>
+
+		<!-- Add a Summary Section -->
+	{:else if $state.value === 'summary'}
+		<div>
+			<h1 class="text-2xl">Summary</h1>
+			<p>Name: {$form.name}</p>
+			<p>Email: {$form.email}</p>
+			<button class="px-4 py-2 mt-4 text-white bg-blue-500 rounded" on:click={() => send('SUBMIT')}>
+				Submit
+			</button>
+		</div>
+	{:else if $state.value === 'submitting'}
+		<div>
+			<h1 class="text-2xl">Submitting...</h1>
+		</div>
+	{:else if $state.value === 'success'}
+		<div>
+			<h1 class="text-2xl">User created successfully!</h1>
+			<!-- You can add a button to reset the form or navigate to another page -->
+		</div>
+	{:else if $state.value === 'failure'}
+		<div>
+			<h1 class="text-2xl">Failed to create user. Please try again.</h1>
+			<button class="px-4 py-2 mt-4 text-white bg-red-500 rounded" on:click={() => send('SUBMIT')}>
+				Retry
+			</button>
+		</div>
+	{/if}
+</main>
diff --git a/src/lib/components/examples/TreeForm.svelte b/src/lib/components/examples/TreeForm.svelte
deleted file mode 100644
index 877841b..0000000
--- a/src/lib/components/examples/TreeForm.svelte
+++ /dev/null
@@ -1,68 +0,0 @@
-<script lang="ts">
-	import { superForm } from 'sveltekit-superforms/client';
-	import { TreeSchema } from '$lib/types/treeSchema'; // Import the TreeType schema
-	import { afterUpdate } from 'svelte';
-	import { writable } from 'svelte/store';
-
-	const initialFormData = { name: '', age: '' }; // Replace email with age
-
-	const { form, errors, validate, constraints, capture, restore } = superForm(initialFormData, {
-		validators: TreeSchema, // Use TreeSchema
-		warnings: {
-			noValidationAndConstraints: false
-		},
-		validationMethod: 'oninput',
-		clearOnSubmit: 'errors-and-message'
-	});
-
-	export const snapshot = { capture, restore };
-	const successMessage = writable<string | null>(null);
-
-	async function handleSubmit() {
-		const validationResult = await validate();
-		if (!validationResult.valid) {
-			return;
-		}
-		console.log(form);
-		successMessage.set('Form submitted successfully!');
-	}
-
-	function handleReset() {
-		form.set({});
-		successMessage.set(null);
-	}
-
-	afterUpdate(() => {
-		const messageContainer = document.getElementById('message-container');
-		if (messageContainer) {
-			messageContainer.scrollIntoView({ behavior: 'smooth' });
-		}
-	});
-</script>
-
-{#if $successMessage}
-	<!-- Success message code remains the same -->
-{:else}
-	<form on:submit|preventDefault={handleSubmit} class="w-full max-w-md">
-		<!-- Name field remains the same -->
-
-		<div class="mb-4">
-			{#if $errors.age}
-				<span class="block mb-2 font-semibold text-red-500">{$errors.age}</span>
-			{:else}
-				<label for="age" class="block mb-2 font-semibold text-white">Age</label>
-			{/if}
-
-			<input
-				name="age"
-				type="number"
-				class="w-full px-3 py-2 bg-transparent border-gray-100 rounded-md border-1 ring-0 ring-white focus:outline-none focus:ring-2 focus:ring-blue-500"
-				bind:value={$form.age}
-				aria-invalid={$errors.age ? 'true' : undefined}
-				{...constraints.age}
-			/>
-		</div>
-
-		<!-- Submit button code remains the same -->
-	</form>
-{/if}
diff --git a/src/lib/components/recipies/userService.ts b/src/lib/components/examples/userService.ts
similarity index 100%
rename from src/lib/components/recipies/userService.ts
rename to src/lib/components/examples/userService.ts
diff --git a/src/lib/components/recipies/recipeStore.ts b/src/lib/components/recipies/recipeStore.ts
deleted file mode 100644
index 5c0c7bd..0000000
--- a/src/lib/components/recipies/recipeStore.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-import { writable } from 'svelte/store';
-
-export const recipeStore = writable({
-    id: 'createUser',
-    step: 0,
-    context: {},
-    error: null
-});
diff --git a/src/lib/types/TreeSchema.ts b/src/lib/types/TreeSchema.ts
index c88cae6..d45bd92 100644
--- a/src/lib/types/TreeSchema.ts
+++ b/src/lib/types/TreeSchema.ts
@@ -1,18 +1,19 @@
 import { z } from 'zod';
 
-// Define custom validation messages
 const validationMessages = {
     name: {
         minLength: 'Name must be at least 3 characters.',
         maxLength: 'Name must contain at most 50 characters.',
     },
-    age: {
-        min: 'Age must be at least 0 years.',
-        max: 'Age must be at most 5000 years.'
+    email: {
+        invalid: 'Please provide a valid email address.',
     }
 };
 
 export const TreeSchema = z.object({
-    name: z.string().min(3, validationMessages.name.minLength).max(50, validationMessages.name.maxLength),
-    age: z.number().min(0, validationMessages.age.min).max(5000, validationMessages.age.max)
+    name: z.string()
+        .min(3, validationMessages.name.minLength)
+        .max(50, validationMessages.name.maxLength),
+    email: z.string()
+        .email(validationMessages.email.invalid)
 });
diff --git a/svelte.config.js b/svelte.config.js
index c50b321..dce3364 100644
--- a/svelte.config.js
+++ b/svelte.config.js
@@ -5,6 +5,10 @@ const config = {
   kit: {
     adapter: adapter()
   },
+  ssr: {
+    // Other SSR options...
+    dynamicImportShim: false
+  },
   preprocess: vitePreprocess(),
 };
 export default config;
\ No newline at end of file